Improvement in machines for polishing marble



UNITED STATES VILLIAM EMMETT, OF GALVESTON, TEXAS.

Specification forming part of loetters Patent No. 27,53@ dated March 20,1860.

To QZZ whom t may concern: l

Be it known that I, WILLIAn EMnn'rr, of Galveston, in the county ofGalveston and State of Texas, have invented a new and Improved Machinefor Rubbing and Polishing Marble, tbc.; and I do hereby declare that thefollowing is a full, clear, and exact description of the same, referencebeing had to the accompanying drawings, forming a part of thisspecification, in which- Figure l represents a transverse verticalsection of my invention arranged for rubbing and polishing a 'iiutedcolumn. Fig. 2 is a longitudinal vertical section of the same. Fig. 3 isan inverted plan of the rubbing-surface for flat surfaces. Fig. l is aninverted plan of the rubbing-surface for moldings. Fig. 5 is atransverse vertical section of the same.

Similar letters in all the figures refer to corresponding parts.

Bythe present method of rubbing and polishing the surfaces of, articlesmade of marble or other similar substance a great deal ot labor and timeis spent, it being necessary in the iirst place to smooth the surfacewith the proper tools very carefully, and after this a long and tiresomerubbing is required. To save much ot this labor and to facilitate theoperation of smoothing, rubbing, and polishing lthe surface of articlesof stone, marble, dre., is the object of my iuvention,which consists incombining with a shifting-box a reservoir to contain the water with adouble ,bottom and regulating-tap, and a sand-box' the bottom of whichforms or has attached to it a rubbing-surface to correspond to thesurface to be polished, so that the same shiftingbox and reservoir canbe used for rubbing and polishing different surfaces-such as tintedcolumns, moldings, or flat plates, or blocks; and it also consists, in aparticular combination of rollers for the purpose of rubbin g tintedcolumns.

To enable those skilled in the art to make and use my invention, I willproceed to describe it.

A represents the shifting box, which is provided with handles B, thatserve to push or draw the box along on the surface of the stone or otherarticle to be rubbed. Fitted nicely into this box is the water-boxC,which is furnished with a double bottom a l), and a stopcock D, thatfits into an opening in the inner bottom o.. The lower bottom I) isperforated with a number of holes c, so that the water which is admittedfrom the box through the opening in the inner bottom is distributed overthe entire surface of the lower bottom. The stop-cock D serves also toregulate the flow of the water. ateris introduced into the box C throughan aperture d, that is closed by a stopper, and the box is kept in itsplace by passing a rod through two lugs e, which are rigidly att-achedto the shifting box A.

E is the sand-box, which tits nicely into the lower part of the shiftingbox A, being retained in the same by two setscrews f, and secured to theunder side of the bottom of said sand-boX is the rubbing-surface. Thesand contained in the box E is washed down gradually through small holesg, and the number and size of these holes may be varied according to thework to be executed.

The rubbing-surface F* for fluted columns consists of a series ofrollers F F', that rotate freelyin the arched pendants G G under thebottom of the said box. Each of the rollers is formed of a number ofrubbing-disks 7L, which are furnished with incisions t' to increasetheir efticacy. The middle roller F turns in suitable recesses in theinner sides of the pendants G, and itis arranged insuch a manner that itcan easily be taken out and replaced by one of larger or smallerdiameter. The outer rollers F work in slotted pendants G', which aresecured to the outside ofthe pendants G by means of pivots i', and whichare adjustable in slots j in the arms I. The axles of the rollers F areconnected with the pivots t" by thin springs 7c, so that the severalrollers may be brought closer together' or farther apart, according tothe diameter and to the size and depth of the flutes t0 be rubbed. Theouter rollers are also so arranged that they can be taken off andreplaced by others ot larger or smaller diameter, so that the wholerubbing-surface can be made to adapt itself to flutes of different sizeand depth.

The rubbing-surface K for fiat plates or blocks is represented in Fig.It consists of a series of parallel slats Z, with interme` diate spacesl', and each of the slats is furnished with one or more notches m,whereby its effect is materially increased.

The rubbing-surface L is represented in Figs. 4 and 5. It is formed of aseries of slats n, the edges of which are out out, so as to correspondto the molding` to be polished, and the surface L, as Well as thesurface K, is attached directly to the bottom of the sandbox.

The operation will be easily understood. Sand is introduced into thesand-box E, and the shifting box is placed omit and secured to the sameby the set-screws f. The Waterbox C, filled With Water, is now placedinto the top of the shifting box, and the Whole is carried backward andforward on the surface of the stone or marble to be rubbed, and at thesame time the Water from the Water-box C is allowed to drip down intothe sand-box, whereby some of the sand is constantly car- 'ried downonto the surface of the article to be rubbed and between said surfaceand the rubbing-surface of the machine.

The effect of my machine is such that it can be applied ,immediatelyafter the toothchisel, no further tool being needed, so that it requiresconsiderably less time and labor to turn out perfectly smooth andpolished Work than it does with the present method of smoothing andrubbing.

Having` thus fully described my invention, what I claim as new, anddesire to secure by Letters Patent, is-

l. The arrangement of the rubbing-surface F, K, or L, in combinationwith the sand-box E, water-box C, and shifting,` box A, or theirequivalents, substantially as and for the purpose described.

2. The employment of the rollers F F or their equivalents, arranged foroperation substantially as described, for the purpose of rubbing tintedcolumns. v

WM. EMMETT. Vitnesses:

L. M. HITCHCOCK, THos. W. JOSEPH.

